In animals of the phylum Porifera,through which structure does excess water exit the body?

  • A
    Ostia
  • B
    Spongocoel
  • C
    Osculum
  • D
    Canals

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Which of the following statements is without exception for sponges?

The formation of the canal system in sponges is due to

Sponges are

Assertion : Sponges belong to Porifera.
Reason : Sponges have a canal system.

Describe reproduction in Porifera.

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